add scenario for creating a group

tests/Behat/Bootstrap/FeatureContext.php

@@ -25,6 +25,7 @@
 
 final class FeatureContext extends TestCase implements Context
 {
+    use GroupContextTrait;
     use ProjectContextTrait;
 
     private static ?BehatHookTracer $tracer = null;

tests/Behat/Bootstrap/GroupContextTrait.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Redmine\Tests\Behat\Bootstrap;
+
+use Behat\Behat\Tester\Exception\PendingException;
+use Behat\Gherkin\Node\TableNode;
+use Redmine\Api\Group;
+
+trait GroupContextTrait
+{
+    /**
+     * @When I create a group with name :groupName
+     */
+    public function iCreateAGroupWithName(string $groupName)
+    {
+        $data = [
+            'name' => $groupName,
+        ];
+
+        /** @var Group */
+        $groupApi = $this->getNativeCurlClient()->getApi('group');
+
+        $this->registerClientResponse(
+            $groupApi->create($data),
+            $groupApi->getLastResponse()
+        );
+    }
+}

tests/Behat/features/groups.feature

@@ -0,0 +1,20 @@
+Feature: Interacting with the REST API for groups
+    In order to interact with REST API for groups
+    As a user
+    I want to make sure the Redmine server replies with the correct response
+
+    Scenario: Creating a group with minimal parameters
+        Given I have a "NativeCurlClient" client
+        When I create a group with name "Test Group"
+        Then the response has the status code "201"
+        And the response has the content type "application/xml"
+        And the returned data is an instance of "SimpleXMLElement"
+        And the returned data has only the following properties
+            """
+            id
+            name
+            """
+        And the returned data has proterties with the following data
+            | property          | value                |
+            | id                | 4                    |
+            | name              | Test Group           |